Installing Mplayer2 and Smplayer2

MPlayer2 PPA source installation, open terminal, enter command:
sudo add-apt-repository ppa:motumedia/mplayer-daily
sudo apt-get update
sudo apt-get install mplayer2

If you do not want to use this new version, but want to return to the previous old version, you can enter the following command:
sudo apt-get install mplayer
The new version will be removed to install the older versions.

SMPlayer2 PPA source installation, open terminal, enter command:
sudo add-apt-repository ppa:smplayer2/daily
sudo apt-get update
sudo apt-get install smplayer2

Installing Mplayer2 and Smplayer2